Limekiln



No. 6||,402. Patented Sept; 27, |898. E.'V. WINEARD;

Ll M E K l L N (Application led Jan. 1 v

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f\\///////H K Nrrn EDVIN V. WINGARD, OF PHILADELPHIA, PENNSYLVANIA.

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SPECIFICATION forming part of Letters Patent No. 611,402, dated September 2"?, 1898.

Appncanon fue@ January 11, 189s.

To nf/ZZ whom t may concern.-

Be it known that I, EDWIN V. VINGARD, a citizen of the United States of America, residing in Philadelphia, in the State of Pennsylvania, have invented a new and useful Limekiln, of which the following is a specification. i

My invention has relation to improvements in limekilns; and the objects are to simplify and improve existing constructions and devices made for the purpose of reducing limestone to lime by providing a limekiln with an improved cooling-chamber, increase the production capacity and insure the durability of the kiln, and generally to improve and perfect the general construction and utility of the kiln.

I have fully and clearly illustrated my improvements in the accompanying drawings, wherein- Figure 1 is a sectional plan taken on the line l 1 of Fig. 2. Fig. 2 is a central vertical section on the line 2 2 of Fig. 1.

A designates the base of the kiln, made up of the usual masonry, having built or formed therein the furnaces 3 4 5 6, duplicates in construction and arranged at right angles to each other, as shown in Fig. 1 of the drawings. These furnaces occupy the upper portion of the base structure and are roofed in by arched tops 7 and provided with grate-bars S, the fronts or openings thereto being closed by substantial metal doors 9. At the rear ofl each furnace is a vertical fire-wall or pier 10, rising from the bridge-wall of the furnace to the arch of the roof and located intermediate of the opening to the cupola to serve as a support for the furnace-roof at this point, a deflector for the iiames into the cupola, and as a shield to prevent the products of the kiln from falling outward into the furnaces. At the inner end of each furnace is a bridge 11, having the upper face inclined from the top downward and inward, as seen at 12, and in the masonry of each furnace is formed a cold-air slot or opening 13, opening into ways 14, leading into the furnaces adjacent to the base of the arches thereof, as shown in the drawings. The main slot 13 has any suitable opening through the outer face of the wall to admit the air, as indicated in dotted lines in Fig. 1 of the drawings, the purpose being to Serial No. 575,156. (No model.)

admit the outside air to` increase combustion and preventsrnoke accumulations. In the interior faces ofthe base or coolingchamber of the kiln, below the furnaces, substantially midway of: the height of the base, the bricks or masonry at intervals are laid or placed to extend inward beyond the faces of the main walls, as shown, forming elongated vertical projections 15, arranged parallel with each other to prevent the burnt lime from falling down, as it otherwise would do were notthese obstructions interposed, and to hold the burnt material in the cooling `chamber or space above the pit and below the action of the furnaces until cooled and ready for discharge and withdrawal. Under one of the furnaces is formed an opening, as 16, to admit a wagon, cart, or car, into which the lime can be loaded immediately from the burnt charge as it descends. If a car is used, a track 17 can be laid on the floor of the base whereon the car can be run.

Mounted on the furnaces is the cupola B, built of an inner substantial lining of firebrick 18, an outer Wall of red brick 19, and a covering of strong boiler-iron 20, substantially as seen in the drawings. At determined distances in the cupola are formed apertures 21, opening through the walls and made flaring from the point of entrance to their opening into the cupola. These apertures 21 afford means for examining the condition of the contents of the kiln to ascertain the progress of reduction; and should the lime become bridged or clogged in thecupola a bar can be passed in the cupola through the apertures and the contents loosened up and made free to pass on down the cupola. The interior of the kiln at the base rand lower portion is square with rounded corners, as at 22, and above the furnaces the cupola is round and conical from its base to the top, as indicated in the drawings. The conical construction permits the lime to gradually fall down without materialobstruction, and yet does not leave the contents to fall faster than perfect combustion is completed.

On the top of the cupola is built or erected the stack 23, reaching to such height as may be determined by the capacity of the kiln and the draft to be required. In the stack may be a suitable damper 24 to regulate ICO the draft, and at the base of the stack is an aperture or opening 25, through which the stock is supplied to the kiln, the opening 25 being closed by a suitable door, as 26V.

All the furnaces :may be used at once or three of them, according to the expedition required in the reduction of the raw material, the arrangement of the furnaces at right angles to each other being adapted to throw the heat at the points most desirable, and this particular construction of the kiln being such that complete reduction of the material is insured.

In the use of my improved kiln the charge is made by lling up the base to a line adjacent to and below the bridge-Walls of the furnaces with earth or other suitable material and then supplying the charge of limestone through the door at the top of the cupola. The iires are then started, and when the burning of that part of the charge subjected to the flames of the furnaces is completed the earthiilling in the base is removed and the reduction proceeds.

The limestone is reduced or burnt, descending gradually, and the limestone in the upper part of the cupola continually presenting a new supply to the action of the furnaces for reduction.

Having thus described my improvements,

what I claim, and desire to secure by Letters Patent, is-

In a limekiln, the combination of the cupola or stack, the furnaces at the base of the cupola, and a cooling-chamber below the furnaces, of elongated vertical projections 15 in the wall of the cooling-chamber extending into the chamber beyond the Walls thereof and arranged at intervals parallel with each other, substantially as and for the purpose set forth.

In witness whereof I have hereto set my hand in the presence of two attesting witnesses.

E. V. WIN GARD.

Attest:

S. F. MARSHALL, A. G. HEYLMUN. 

